Brick or lining composition for use at high temperatures and process of making the same.



UNITED STATES PATENT OFFICE.

CHARLES E. POPE, OF PITTSBURG, PENNSYLVANIA.

BRICK OR LINING COMPOSITION FOR USE AT HIGH TEMPERATURES AND PROCESS OFMAKING THE SAME.

Specification of Letters Patent.

Patented Aug. 11, 1908.

Application filed February 21, 1908. Serial No. 416,956.

To all 207mm it may concern:

Be it known that I, CHARLES E. Porn, a citizen of the United States, anda resident of Pittsburg, in the county of Allegheny and State ofPennsylvania, (post-office address 421 Wood street, Pittsburg,Pennsylvania,) have invented certain new and useful Improvements inBrick or Lining Composition for Use at High Temperatures and the Processof Making the Same, of which the following is a specification.

The invention relates particularly to refractory bricks and liningscomposed largely of silica, for open-hearth furnaces, cruciblesteEIffirnaces, coke ovens, glass furnaces, and other high temperatureuses, and its object is to produce such material of a highly desirableand refractory character mainly composed of finely divided burnt silicabrick material containing not less. than seventy per cent. of silicamoldedtnid bonded together withoutbifrning. The invention also, amongother results, makes it possible to utilize refuse silica brickbats 3 ndlggokgn and discarded silica 11c; iii are manufacture of the new brickor lining.

It is also available for the construction of monolithic structures andof blocks and sha es which are diflicult or im ossible to ma e of theusual burnt silica brie material.

It also enables me to make blocks and shapes of accurate size withoutthe uncertainty due to the expansion in the original firing of thesilica brick. It will be understood that by brick I mean to include, asequivalent, furnace linings, monolithic masses, and the like, whetherbuilt up or molded in site.

The preferred )rocess is as follows \Vhcre available I take broken orrefusc silica fire brick and grind it. For the highest grade of materialI prefer to select a silica brick composition containing aboutninety-eight per cent. silica, as is common, though seventy percenfiainil upwards is very serviceable. When I speak of the percentageof silica I do not mean to imply that it is all.free or uncombinedchemically. This ground material is then mixed \yitl Roi-tland cementand suflicient water to cause the ccment to finally set when molded intobricks or other forms, or applied in place for linings, repairs, etc. asdesired, and upon becoming hard it )roduccs a new com osition in whichthe finely divided silica bric material is embedded and bonded togetherby the hydrated Portland cement. Only enough cement need be used tofully embed and bond the ground brick, but I increase the amount wherethe brick, after being made, is to receive much handling or betransported. One part of cement to ten of the ground brick will make agood proportion.

\Vhere refuse silica brick is not available it may be made, burned, andground expresslf rick material that has been burned at a hightemperature in its formation, and is therefore peculiarly fitted towithstand such tempcratures.

What I claim is: 1. The process of making a refraeto composition, whichconsists in forming am burning a composition suitable for silicafirebrick and containing from seventy to ninetynine'per cent. s i1 ic a,subsequently finely dividing the same and mixing it with Rtntlanglcement and water, and causing the mass to set for substantially thepurposes set forth.

2. The process of making a refractorycomposition, which consists inmixing finely divided and previously burnt silica brick, containing notless than seventyper cent. of silica with Portland cement and water, andthen molding and allowing the inas's'to solidify. 3. A brick or liningcomposition for use at high tem )eraturcs, composed of finely dividedburnt silica brick material containing at least seventy per cent. silicaembedded in and bonded by Portland cement.

ii 4. A brick or lining composition for use at specification in thepresence of two subscrib high temperatures, composed of finely dividedburnt silica brick material containing at least seventy per cent. s ilica embedded in 5 and bonded by Portland cement, and containing pores.

In testimony whereof I have signed this mg witnesses, the 19th day ofFebruary 1908.

CHARLES E. POPE.

